Sealant Calculator
Use this calculator to estimate how many 300 mL sealant cartridges you need for your job. Enter your joint dimensions and get an instant order quantity.
Unit System
Toggle between Imperial (feet / inches) and Metric (meters / mm).
Joint Dimensions
Total Joint Length (ft)
Enter the total length of the joint in feet. Switch to metric above if preferred.Joint Width (mm)
The opening width of the joint at the surface. Most common joints are 6–20 mm wide.Joint Depth (mm)
The depth of sealant fill required. Typically equal to or less than the joint width.Waste & Overage
Waste / Overage Factor (%)
Accounts for nozzle purge, applicator waste, and end-of-joint overfill. Default 10% is recommended.Estimated Volume
Estimated Sealant Volume (mL)
Volume Including Waste (mL)
Cartridges Required
Cartridge Size
Based on standard 300 mL Würth sealant cartridges.Cartridges Required
Suggested Order Quantity
Always rounded up — a partial cartridge still requires a full purchase.
Note: Porous substrates such as concrete or masonry may require additional sealant. Increase your waste factor to account for absorption.
